6 months ago - SLG-Dennis - Direct link
Unfortunately it doesn't seem like this is the case, as of the official Steam documentation Steam Cloud or one's own online service for storing data is still required: https://partner.steamgames.com/doc/features/cloudgaming?l=english

We would reconsider support for the future once that requirement has changed or Steam Cloud is able to deal with games without traditional savegames like ours.